Wednesday Aug 13, 2014

Support for Kernel Zones with the Oracle Solaris Cluster 4.2 Data Service for Oracle Solaris Zones

The Oracle Solaris Cluster Data Service for Oracle Solaris Zones is enhanced to support Oracle Solaris Kernel Zones (also called solaris-kz branded zones) with Oracle Solaris 11.2.

This data service provides high availability for Oracle Solaris Zones through three components in a failover or multi-master configuration:

  • sczbt: The orderly booting, shutdown and fault monitoring of an Oracle Solaris zone.
  • sczsh: The orderly startup, shutdown and fault monitoring of an application within the Oracle Solaris zone (managed by sczbt), using scripts or commands.
  • sczsmf: The orderly startup, shutdown and fault monitoring of an Oracle Solaris Service Management Facility (SMF) service within the Oracle Solaris zone managed by sczbt.

With Oralce Solaris Cluster 4.0 and 4.1 the sczbt component does support cold migration (boot and shutdown) of solaris and solaris10 branded zones.

The sczbt component now in addition supports cold and warm migration for kernel zones on Oracle Solaris 11.2. Using warm migration (suspend and resume of a kernel zone) allows you to minimize planned downtime, in case a cluster node is overloaded or needs to be shutdown for maintenance.

By deploying kernel zones under control of the sczbt data service, system administrators can provide a highly available virtual machine with enhanced flexibility associated with being able to support consolidation of multiple zones with separate kernel patch levels on a single system. At the same time the administrator has the ability to very efficiently consolidate multiple workloads onto a server.

The three data service components are now implemented as their own dedicated resource types as follows:

  • sczbt - ORCL.ha-zone_sczbt
  • sczsh - ORCL.ha-zone_sczsh
  • sczsmf - ORCL.ha-zone_sczsmf

Resource configuration is still done by amending the component configuration file and providing it to the component register script. There is no longer a need to configure or maintain a parameter file for the sczbt or sczsh component.

In case existing deployments of the data service components are upgraded to Oracle Solaris Cluster 4.2, there is no requirement to re-register the resources. The previous SUNW.gds based component resources continue to run unchanged.

For more details, please refer to the Oracle Solaris Cluster Data Service for Oracle Solaris Zones Guide.

Thorsten Früauf
Oracle Solaris Cluster Engineering

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